[3] The Wet Sclerophyll Basalt Forests of the Sydney Basin Bioregion, existing as a scattered remnant, also occurs in the ecoregion but in small percentage, such as in areas like the Yengo National Park, the Mount Gibraltar Reserve, Robertson, Moss Vale, Bundanoon and Wingello, which also lie on fertile soils derived from basalts.

A thin to dense layer of shrubs, vines, and various understorey of native grasses, forbs, twiners and ferns exist.

[2] The wet sclerophyll parts of the ecoregion feature shrubs such as Polyscias sambucifolia, Coprosma quadrifida, Senecio linearifolius, Daviesia ulicifolia and Leucopogon lanceolatus, including vines such as, Eustrephus latifolius, Rubus parvifolius, Rubus rosifolius, Smilax australis, Hardenbergia violacea and Hibbertia scandens.

[4] Mammals include wallabies, pademelons, native rats, Antechinus spp, Tachyglossus aculeatus, Vombatus ursinus, Macropus giganteus and Pteropus poliocephalus.

Birds include Ninox strenua, Tyto tenebricosa, Monarcha melanopsis, Leucosarcia melanoleuca, Lopholaimus antarcticus, Chalcophaps indica, Macropygia amboinensis and Rhipidura rufifrons.